Dinitro-diamino-benzophenone.



i o. 4 ar -'s Missiles Sill LKQUIS BLA'NGEY, 03:? MANNHEIM,EtERMANY, ASfiIGNQEt 1P0 HJADIiSGHE ANILIN do some FAIBEIK, 0F L'U'DWXGSHAFEN-0N-THE-EHINE, iGERMA'NY-Z'.

'DINITEO-EIAMINGQSENZOPHENONE.

Ito Brewing".

' ing is a specification.

the presence of On reduction with stannous "state how I can obtain my new 1 have discovered a. new compound which is dinitro-di'amino-benzophenone, which possesses oconstitution corresponding to the formula:

and which is characterized by the following prope1*ties:-It possesses an orange to yellow color, melts when pure at about 292 (3., is insolublein dilute hydrochloric acid, very difiicultly soluble in alcohol, other and ben' zone, and easily "soluble in boiling ci'esol. chlorid. it gives rise to a. body, which in the pure state melts at about 213-21 C. and gives a colorless solution in concentrated sulfuric acid.

My new compound can be obtained by dinitrating' Fe l-dichlor-benzophenone end then heating the product with ammonia If the heating with ammonia be carried out in alcohol, I obtain practicolly pure dinitro-diamino-benzophenone,

whereas it the reaction be carried out in the,

presence of water a mixture of dinitro'di' omino-benzophenone with dinitro-umino- .chlor-benzophenone is produced. My new compound, dinitro-(iiaminobensonltienoneis suitable for use as s pigment, both by'itself and also in the form of a mixture with dinitro-amino-chlor-benzophenone, end I wish to be understood as claiming my new dinitro-diamino-benzophenon botli'by itselt and also in admixture with other compounds.

' The following examples will serve to illuscompound trom 4.4 dichlor-benzophenone. The parts are by weight.

.ing 4A%% oi: nitric tion maintain the temperature at from 0,

Specification of Letters Patent Patented July 211, 11914., Application filed Februar as, one. ammo.

Example 1'. Dissolve 6.275 ports he.dichioi-benzcughenone in 25 ports of 97% sulfuric acid at ordinary temperature, on then add, during 2. period of from 2 to 3 hours, 7.25 sorts oi nitretingecid cont-sin.- acid" During the addito 10 t). Then stir for from 3 to 4 hours and "pour the mixture onto ice, filter 05 the precipitete, Wash it well and dry it. In this way good yield of dinitro dichlorbenzophenone is obtained.

Example 2: Heat together in an autoclave for 10 hours at from 150-160 C. 1 port of dinitro-dichlor-benzophenone, obtained according to. the foregoing example, end 5 arts of alcoholic ammonia containing 10% NH l/Vhen the mixture is cold, filter oi? the precipitate, wash it with water and dry it. it consists. of almost pure dinitro-di umino benzophenone and melts at about 28%)220 (3. li? in this example the alcoholic ammoniube replaced by 2 parts of 20% aqueous ammonia. and 21} parts of Water and the hosting be carried out for 5 hours at from 149%45 (1., c mixture of dinitro-diiunino-benzophenone with dinitro-emi'no chlor-bensophenone is obtained.

Now what TL claim is:

The new dinitro*diamino-benzophenone which possesses an orange to yellow color, melts in the pure state at about 292 C. is insoluble in dilute hydrochloric acid, very dii'ficultly soluble in alcohol, ether and hen oesily soluble in boiling cresol and on reductio with stennous ohloricl gives rise to product which melts at from 21321 i" C3. and yields u colorless solution in concert tmted sulfuric acid.

in testimony whereof it have hereunto set of pure 

